using System;

namespace Org.BouncyCastle.Crypto.Parameters
{
	public class ParametersWithIV
		: ICipherParameters
	{
		private readonly ICipherParameters	parameters;
		private readonly byte[]				iv;

		public ParametersWithIV(
			ICipherParameters	parameters,
			byte[]				iv)
			: this(parameters, iv, 0, iv.Length)
		{
		}

		public ParametersWithIV(
			ICipherParameters	parameters,
			byte[]				iv,
			int					ivOff,
			int					ivLen)
		{
			if (parameters == null)
				throw new ArgumentNullException("parameters");
			if (iv == null)
				throw new ArgumentNullException("iv");

			this.parameters = parameters;
			this.iv = new byte[ivLen];
			Array.Copy(iv, ivOff, this.iv, 0, ivLen);
		}

		public byte[] GetIV()
		{
			return (byte[]) iv.Clone();
		}

		public ICipherParameters Parameters
		{
			get { return parameters; }
		}
	}
}
